Sebastián Murgueitio Ramírez
Datos Biográficos
| ID | 1179792 |
|---|---|
| NOMBRE | Sebastián Murgueitio Ramírez |
| NOMBRES | Sebastián Murgueitio |
| APELLIDO | Ramírez |
| FIRMA | RAMÍREZ S M |
| AFILIACIONES | Purdue University West Lafayette |
| ORCID | 0000-0003-0035-0150 |
| VERIFICADO | Sí |
| TOTAL DE OBRAS | 12 |
| TOTAL DE CITAS | 8 |
| TOTAL COMO AUTOR | 12 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 2020 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2026 |
| ÍNDICE H | 2 |
Implicit and Formal Symmetries
In this paper, I distinguish between three different roles that symmetries play in physics practice that are not always distinguished in the philosophical literature and which seem to clash with each other. I then propose that the best way to make sense of these roles requires introducing a distinction between two different kinds of symmetries. One kind concerns invertible transformations that map solutions to solutions. The other is associated w…
Galileo's ship and the relativity principle
It is widely acknowledged that the Galilean Relativity Principle, according to which the laws of classical systems are the same in all inertial frames in relative motion, has played an important role in the development of modern physics. It is also commonly believed that this principle holds the key to answering why, for example, we do not notice the orbital velocity of the Earth as we go about our day. And yet, I argue in this paper that the pre…
Abandoning Galileo’s Ship
The recent debate about whether gauge symmetries can be empirically significant has focused on the possibility of 'Galileo's ship' types of scenarios, where the symmetries effect relational differences between a subsystem and the environment. However, it has gone largely unremarked that apart from such Galileo's ship scenarios, Greaves and Wallace (2014) proposed that gauge transformations can also be empirically significant in a 'non-relational'…
On Symmetries and Springs
Imagine that we are on a train, playing with some mechanical systems. Why can’t we detect any differences in their behavior when the train is parked versus when it is moving uniformly? The standard answer is that boosts are symmetries of Newtonian systems. In this article, I use the case of a spring to argue that this answer is problematic because symmetries are neither sufficient nor necessary for preserving its behavior. I also develop a new an…
Getting back in shape
In this paper, we will introduce a novel argument (the “Region Argument”) that objects do not have frame‐independent shapes in special relativity. The Region Argument lacks vulnerabilities present in David Chalmers' argument for that conclusion based on length contraction. We then examine how views on persistence interact with the Region Argument. We argue that this argument and standard four‐dimensionalist assumptions entail that nothing in a re…
Symmetries and Measurements
According to the orthodox view, one can appeal to the symmetries of a theory in order to show that it is impossible to measure the properties that are not invariant under such symmetries. For example, it is widely believed that the fact that boosts are symmetries of Newtonian mechanics entails that it is impossible to measure states of absolute motion in a Newtonian world (these states vary under boosts). This paper offers an overview of the vari…
Symmetries and Representation
It is often said in physics that if two models of a theory are related by a symmetry, then the two models provide (or could provide) two different representations of the very same situation, alike the case of two maps of different color for the very same city. It is also said that the situations represented by two models of a theory are indiscernible in some ways when the models in question are related by a symmetry of the theory, just like the s…
Causation and the conservation of energy in general relativity
Consensus in the contemporary philosophical literature has it that conserved quantity\ntheories of causation such as that of Dowe [2000]—according to which causation is to be\nanalysed in terms of the exchange of conserved quantities (e.g., energy)—face damning\nproblems when confronted with contemporary physics, where the notion of conservation\nbecomes delicate. In particular, in general relativity it is often claimed that there simply\nare no …
A Puzzle Concerning Local Symmetries and Their Empirical Significance
In the last 5 years, the controversy about whether or not gauge transformations can be empirically significant has intensified. On the one hand, Greaves and Wallace developed a framework according to which, under some circumstances, gauge transformations can be empirically significant—and Teh further supported this result by using the constrained Hamiltonian formalism. On the other hand, Friederich claims to have proved that gauge transformation …
Measuring Absolute Velocity
We argue that Roberts’s argument for the thesis that absolute velocity is not measurable in a Newtonian world is unsound, because it depends on an analysis of measurement that is not extensionally adequate. We propose an alternative analysis of measurement, one that is extensionally adequate and entails that absolute velocity is measured in at least one Newtonian world. If our analysis is correct, then this Newtonian world is a counterexample to …
Separating Einstein's separability
One hundred years of general relativity
On Symmetries and Springs
Imagine that we are on a train, playing with some mechanical systems. Why can’t we detect any differences in their behavior when the train is parked versus when it is moving uniformly? The standard answer is that boosts are symmetries of Newtonian systems. In this article, I use the case of a spring to argue that this answer is problematic because symmetries are neither sufficient nor necessary for preserving its behavior. I also develop a new an…
Abandoning Galileo’s Ship
The recent debate about whether gauge symmetries can be empirically significant has focused on the possibility of 'Galileo's ship' types of scenarios, where the symmetries effect relational differences between a subsystem and the environment. However, it has gone largely unremarked that apart from such Galileo's ship scenarios, Greaves and Wallace (2014) proposed that gauge transformations can also be empirically significant in a 'non-relational'…
A Puzzle Concerning Local Symmetries and Their Empirical Significance
In the last 5 years, the controversy about whether or not gauge transformations can be empirically significant has intensified. On the one hand, Greaves and Wallace developed a framework according to which, under some circumstances, gauge transformations can be empirically significant—and Teh further supported this result by using the constrained Hamiltonian formalism. On the other hand, Friederich claims to have proved that gauge transformation …
Symmetries and Representation
It is often said in physics that if two models of a theory are related by a symmetry, then the two models provide (or could provide) two different representations of the very same situation, alike the case of two maps of different color for the very same city. It is also said that the situations represented by two models of a theory are indiscernible in some ways when the models in question are related by a symmetry of the theory, just like the s…
Separating Einstein's separability
Measuring Absolute Velocity
We argue that Roberts’s argument for the thesis that absolute velocity is not measurable in a Newtonian world is unsound, because it depends on an analysis of measurement that is not extensionally adequate. We propose an alternative analysis of measurement, one that is extensionally adequate and entails that absolute velocity is measured in at least one Newtonian world. If our analysis is correct, then this Newtonian world is a counterexample to …
A Puzzle Concerning Local Symmetries and Their Empirical Significance
In the last 5 years, the controversy about whether or not gauge transformations can be empirically significant has intensified. On the one hand, Greaves and Wallace developed a framework according to which, under some circumstances, gauge transformations can be empirically significant—and Teh further supported this result by using the constrained Hamiltonian formalism. On the other hand, Friederich claims to have proved that gauge transformation …
Causation and the conservation of energy in general relativity
Consensus in the contemporary philosophical literature has it that conserved quantity\ntheories of causation such as that of Dowe [2000]—according to which causation is to be\nanalysed in terms of the exchange of conserved quantities (e.g., energy)—face damning\nproblems when confronted with contemporary physics, where the notion of conservation\nbecomes delicate. In particular, in general relativity it is often claimed that there simply\nare no …
One hundred years of general relativity
On Symmetries and Springs
Imagine that we are on a train, playing with some mechanical systems. Why can’t we detect any differences in their behavior when the train is parked versus when it is moving uniformly? The standard answer is that boosts are symmetries of Newtonian systems. In this article, I use the case of a spring to argue that this answer is problematic because symmetries are neither sufficient nor necessary for preserving its behavior. I also develop a new an…
Getting back in shape
In this paper, we will introduce a novel argument (the “Region Argument”) that objects do not have frame‐independent shapes in special relativity. The Region Argument lacks vulnerabilities present in David Chalmers' argument for that conclusion based on length contraction. We then examine how views on persistence interact with the Region Argument. We argue that this argument and standard four‐dimensionalist assumptions entail that nothing in a re…
Symmetries and Measurements
According to the orthodox view, one can appeal to the symmetries of a theory in order to show that it is impossible to measure the properties that are not invariant under such symmetries. For example, it is widely believed that the fact that boosts are symmetries of Newtonian mechanics entails that it is impossible to measure states of absolute motion in a Newtonian world (these states vary under boosts). This paper offers an overview of the vari…
Symmetries and Representation
It is often said in physics that if two models of a theory are related by a symmetry, then the two models provide (or could provide) two different representations of the very same situation, alike the case of two maps of different color for the very same city. It is also said that the situations represented by two models of a theory are indiscernible in some ways when the models in question are related by a symmetry of the theory, just like the s…
Galileo's ship and the relativity principle
It is widely acknowledged that the Galilean Relativity Principle, according to which the laws of classical systems are the same in all inertial frames in relative motion, has played an important role in the development of modern physics. It is also commonly believed that this principle holds the key to answering why, for example, we do not notice the orbital velocity of the Earth as we go about our day. And yet, I argue in this paper that the pre…
Abandoning Galileo’s Ship
The recent debate about whether gauge symmetries can be empirically significant has focused on the possibility of 'Galileo's ship' types of scenarios, where the symmetries effect relational differences between a subsystem and the environment. However, it has gone largely unremarked that apart from such Galileo's ship scenarios, Greaves and Wallace (2014) proposed that gauge transformations can also be empirically significant in a 'non-relational'…
Implicit and Formal Symmetries
In this paper, I distinguish between three different roles that symmetries play in physics practice that are not always distinguished in the philosophical literature and which seem to clash with each other. I then propose that the best way to make sense of these roles requires introducing a distinction between two different kinds of symmetries. One kind concerns invertible transformations that map solutions to solutions. The other is associated w…
Physics (11 obras) · Theoretical physics (10 obras) · Philosophy (8 obras) · Epistemology (7 obras) · Mathematics (7 obras) · Relativity and Gravitational Theory (7 obras) · Geometry (6 obras) · Homogeneous space (6 obras) · Philosophy and History of Science (5 obras) · Quantum Mechanics and Applications (5 obras)